The Witcher 2 Skills, Abilities, and Talent Tree Guide
Major update for Skyrim Build Planner (new look, adjustable skills and attributes, new mobile UI, leveling map, streamlined perk tree manipulations). : r/skyrim
Skyrim: Guide To Legendary Skills
Perk Calculator for Skyrim - Slunečnice.cz
Skyrim Dawnguard : Vampire & Werewolf Perk Tree & More - YouTube
An explanation of the new legendary skills feature in 1.9 : r/skyrim
The Elder Scrolls V: Skyrim – Dawnguard Preview - The Elder Scrolls V: Skyrim - Dawnguard Vampire Perk Tree - Game Informer